List of National Natural Landmarks in Arkansas

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There are 5 National Natural Landmarks in Arkansas. Four are forests and one is a spring.

Arkansas National Natural Landmarks (clickable map)

Name	Image	Date	Location	County	Ownership	Description
Big Lake Natural Area	File:Big Lake Refuge (12293852915).jpg	1974	35°54′48.61″N 90°7′3.4″W / 35.9135028°N 90.117611°W / 35.9135028; -90.117611	Mississippi	Federal	Forest area within Big Lake National Wildlife Refuge.
Lake Winona Research Natural Area		1976	34°42′36.66″N 94°25′27.81″W / 34.7101833°N 94.4243917°W / 34.7101833; -94.4243917	Saline	Federal	Pine forest near Lake Winona (Arkansas); part of Ouachita National Forest.
Mammoth Spring	File:Mammoth spring (47).JPG	1972	36°29′52″N 91°32′09″W / 36.4978°N 91.5359°W / 36.4978; -91.5359 (Mammoth Spring)	Fulton	State	The largest first magnitude spring in Arkansas, it is connected underground to the Grand Gulf State Park in Missouri.
Roaring Branch Research Natural Area		1976	34°22′22.8″N 93°58′40.8″W / 34.373000°N 93.978000°W / 34.373000; -93.978000	Polk	Federal	Steep ravine with a virgin forest in Ouachita National Forest.
White River Sugarberry Natural Area	File:White River Boardwalk Trail (5781633755).jpg	1974	34°21′0″N 91°6′0″W / 34.35000°N 91.10000°W / 34.35000; -91.10000	Desha	Federal	Virgin hardwood bottomland forest in White River National Wildlife Refuge.

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